001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.classic.turbo;
015
016
017
018import static org.junit.Assert.assertEquals;
019
020import org.junit.Test;
021
022public class LRUMessageCacheTest {
023
024    @Test
025    public void testEldestEntriesRemoval() {
026        final LRUMessageCache cache = new LRUMessageCache(2);
027        assertEquals(0, cache.getMessageCountAndThenIncrement("0"));
028        assertEquals(1, cache.getMessageCountAndThenIncrement("0"));
029        assertEquals(0, cache.getMessageCountAndThenIncrement("1"));
030        assertEquals(1, cache.getMessageCountAndThenIncrement("1"));
031        // 0 entry should have been removed.
032        assertEquals(0, cache.getMessageCountAndThenIncrement("2"));
033        // So it is expected a returned value of 0 instead of 2.
034        // 1 entry should have been removed.
035        assertEquals(0, cache.getMessageCountAndThenIncrement("0"));
036        // So it is expected a returned value of 0 instead of 2.
037        // 2 entry should have been removed.
038        assertEquals(0, cache.getMessageCountAndThenIncrement("1"));
039        // So it is expected a returned value of 0 instead of 2.
040        assertEquals(0, cache.getMessageCountAndThenIncrement("2"));
041    }
042
043}